Claus
Claus :
A process for removing hydrogen sulfide from gas streams by the catalyzed reaction with sulfur dioxide, producing elementary sulfur. The process has two stages: in the first, one third of the hydrogen sulfide is oxidized with air to produce sulfur dioxide; in the second, this sulfur dioxide stream is blended with the remainder of the hydrogen sulfide stream and passed over an iron oxide catalyst at approximately 300oC. The resulting sulfur vapor is condensed to liquid sulfur. H2S + O2 + SO2 + H2O; SO2 + 2H2S + 3S + 2H2O. (Check source for accuracy of chemical formula)
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